A short article for new-ish tabletop role-players, about the main RPGs that are about super-heroes. So that’s useful for orientation, as you’ll see.
Writeups.org is an encyclopaedia of characters in genre fiction — comic books, video games, action movies, etc. It offers illustrated, researched profiles. These also include technical data for role-players. If you need a robust understanding of a character’s abilities, personality, history, etc. this is *the* place to be.